maths cards for maths revision 2.5 / 5HideShow resource informationMathematicsAnglesGCSEAll boardsCreated by: alayaCreated on: 10-04-12 10:39 Exterior angles Exterior angle= 360/n Sum of exterior angles= 360 1 of 6 Interior angles Interior angle= 180- EXTERIOR ANGLE Sum of interior angles= (n- 2)*180 2 of 6 Area of triangle AREA of a triangle= 1/2 * base * vertical height A= 1/2 * b * h 3 of 6 area of parallelogram AREA of a parallelogram= base * vertical height A= b * h 4 of 6 area of trapezium AREA of trapezium= average of parallel sided * distance between them A= 1/2 * (a+b)* h 5 of 6 area of a circle AREA of circle= pi *(radius)squared A= pi * r squared Circumference= C= pi * D AREA of sector= angle/ 360 * area of full circle LENGTH of arc= angle/360 * circumference of full circle 6 of 6

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